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Synthese und Charakterisierung eines neuen gemischten Titan-Aluminium-Alkoxids

Synthesis and structrual characterization of a novel titanium-aluminium alkoxide


Zeitschrift für anorganische und allgemeine Chemie 623 (1997), No.7, pp.1163-1167 : Ill., Lit.
ISSN: 0044-2313
ISSN: 0372-7874
ISSN: 0863-1786
ISSN: 0863-1778
ISSN: 1521-3749
Journal Article
Fraunhofer IGB ()
aluminium titanate; ceramics precursor; tialite; titanium-aluminium alkoxide; x-ray structure determination

The novel Ti-Al-Alkoxide TiAl2(OiPr)10 was synthesized from aluminium turnings and titanium tetraiso-propoxide in 2-propanol and isolated by subsequent fractionating distillation. Colourless prismatic crystals precipitated after 24 h at 20 deg C from the main fraction. They proved very moisture sensitive. The compound crystallizes in the monoclinic space group C2/c (no. 15) with a = 2303.1(4), b = 1097.2(3), c = 1685.0(3) pm, sigma = 104.32(1)deg and Z = 4. The molecular structure exhibits a bent Al-Ti-Al' unit, in which AI shows tetrahedral, but Ti octahedral coordination. The polyhedra are connected via cis-edges of the octahedron. The structure of the compound in solution was determined by NMR spectroscopy (1H, 13C, COSY) and proved to be identical to the structure in the solid state.